*{
  margin: 0;
  padding: 0;
  list-style-type: none;
  box-sizing: border-box;
}
html,body,#root,#box{
  width: 100%;
  height: 100%;
}
.header{
  background: #fff;
}
.site-layout-background{
  background: #f0f2f5;
  border-radius: 10px;
  width: 97%;
  margin: 0 auto;
  min-height: 280;
  position:relative;
}